A wonderful invention!

We live in an old farmhouse, where there are a number of Hohlräuen. It was not always ensured the expansion that under floors, in ceilings and walls with Holzkonstuktion all cavities with rock wool or similar vermin hostile materials were filled. The consequence ware over the years increasing mice infestation.
Trying to subsequently fill Weißkalkhydrat in the cavities was topped only by limited success because still remained Hohräume to which you did not ran. So rustling and crawling it in walls and ceilings, especially in two-bedroom at night and in the evenings.
Since I discovered this small ultrasound devices as mice Schreck and initially bought only one.
Unfortunately, the success was only moderate because the mice had already set up persistently.
They also found no food in the house, but took advantage of the heat obviously as winter quarters.

So I bought two more bone and put all three in the one bedroom on continuous operation at various frequencies and on different walls. Daan the rustling sounds were less and silent for about 2 weeks with a focus.
But I still had doubts and let the equipment a few more weeks to run in one room. There were no more mice noise.
So I was able to equip the second bedroom with two devices until the mice stopped running.

Now it is free mice in the house for two winter periods. However, it run throughout the year three of these mice fright each distributed in bedroom, garage and storage. The mice have retired. Just in case I have two more units in reserve.
But with the small I am convinced that I have conquered through perseverance the plague of mice.

Those who expect miracles with the equipment, will be disappointed. First, must the mice out of the house, which takes some time.
Also an intense sonication with multiple devices is necessary for this. Later meet critical space per each 1 mice Schreck namely permanent continuously, so that the feed is scared in the fall.
Also in terms of electricity costs at the low wattage, it is hardly noticeable.

I can only recommend to all interested parties to use these devices and to be patient, then a success, nothing stands in the way.